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Fencer Vulns
medium 6.8

CVE-2020-4047 json

Authenticated XSS via media attachment page in WordPress

published 2020-06-12 6 y ago modified 2026-09-08 2 mo ago also BIT-wordpress-2020-4047 , BIT-wordpress-multisite-2020-4047 , EUVD-2020-25305 , GHSA-8q2w-5m27-wm27

cvss
6.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

In affected versions of WordPress, authenticated users with upload permissions (like authors) are able to inject JavaScript into some media file attachment pages in a certain way. This can lead to script execution in the context of a higher privileged user when the file is viewed by them. This has been patched in version 5.4.2, along with all the previously affected versions via a minor release (5.3.4, 5.2.7, 5.1.6, 5.0.10, 4.9.15, 4.8.14, 4.7.18, 4.6.19, 4.5.22, 4.4.23, 4.3.24, 4.2.28, 4.1.31, 4.0.31, 3.9.32, 3.8.34, 3.7.34).

Patch / fix

  • bitnami wordpress 3.7.34, 3.8.34, 3.9.32, 4.0.31, 4.1.31, 4.2.28, 4.3.24, 4.4.23, 4.5.22, 4.6.19, 4.7.18, 4.8.14, 4.9.15, 5.0.10, 5.1.6, 5.2.7, 5.3.4, 5.4.2
  • bitnami wordpress-multisite 3.7.34, 3.8.34, 3.9.32, 4.0.31, 4.1.31, 4.2.28, 4.3.24, 4.4.23, 4.5.22, 4.6.19, 4.7.18, 4.8.14, 4.9.15, 5.0.10, 5.1.6, 5.2.7, 5.3.4, 5.4.2
  • wordpress wordpress 3.7.34, 3.8.34, 3.9.32, 4.0.31, 4.1.31, 4.2.28, 4.3.24, 4.4.23, 4.5.22, 4.6.19, 4.7.18, 4.8.14, 4.9.15, 5.0.10, 5.1.6, 5.2.7, 5.3.4, 5.4.2
  • wordpress Debian 14, Debian 13, Debian 12 5.4.2+dfsg1-1

debian advisories DEBIAN-CVE-2020-4047

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-4047 updated cvss 6.8

wordpress: authenticated XSS via media attachment page

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.27% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N
NVD 3.1 6.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N
OSV 3.1 6.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
bitnami wordpress
>=3.7.0, <3.7.34
>=3.8.0, <3.8.34
>=3.9.0, <3.9.32
>=4.0.0, <4.0.31
>=4.1.0, <4.1.31
>=4.2.0, <4.2.28
>=4.3.0, <4.3.24
>=4.4.0, <4.4.23
>=4.5.0, <4.5.22
>=4.6.0, <4.6.19
>=4.7.0, <4.7.18
>=4.8.0, <4.8.14
>=4.9.0, <4.9.15
>=5.0.0, <5.0.10
>=5.1.0, <5.1.6
>=5.2.0, <5.2.7
>=5.3.0, <5.3.4
>=5.4.0, <5.4.2
3.7.34
3.8.34
3.9.32
4.0.31
4.1.31
4.2.28
4.3.24
4.4.23
4.5.22
4.6.19
4.7.18
4.8.14
4.9.15
5.0.10
5.1.6
5.2.7
5.3.4
5.4.2
bitnami wordpress-multisite
>=3.7.0, <3.7.34
>=3.8.0, <3.8.34
>=3.9.0, <3.9.32
>=4.0.0, <4.0.31
>=4.1.0, <4.1.31
>=4.2.0, <4.2.28
>=4.3.0, <4.3.24
>=4.4.0, <4.4.23
>=4.5.0, <4.5.22
>=4.6.0, <4.6.19
>=4.7.0, <4.7.18
>=4.8.0, <4.8.14
>=4.9.0, <4.9.15
>=5.0.0, <5.0.10
>=5.1.0, <5.1.6
>=5.2.0, <5.2.7
>=5.3.0, <5.3.4
>=5.4.0, <5.4.2
3.7.34
3.8.34
3.9.32
4.0.31
4.1.31
4.2.28
4.3.24
4.4.23
4.5.22
4.6.19
4.7.18
4.8.14
4.9.15
5.0.10
5.1.6
5.2.7
5.3.4
5.4.2

Affected products

  • WordPress wordpress-develop

Classification

Weakness
  • CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of WordPress/wordpress-develop published their own advisory on GitHub. Reviewed sources take precedence over it.